Lubricating device.



PATEN'IED AUG. Il, 1908.

E. J. BRING. LUBRICATING DEVICE.

APPLICATION FILED APR. 8, 1904. Y

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ipk/ENTER: Einar JBP'ir-Lq.

UNITED STATES PATENT. OFFICE.

EINAR J. BRING, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

LUBRICATING- DEVICE.

Patented Aug. 11, 1908.

Application led April 8, 1904. Serial No. 202,132.

To all whom it may concern:

Be it known that I, EINAR J. BRING, a subject of the King of Norway and Sweden, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Lubricating Devices, of which the following is a speciication.

The present invention relates to devices for lubricating, and in its broadest aspect is capable of use in many relations. It is herein shown and described in connection with a double-cylinder air-compressor.

The invention comprises a novel oil pump having a piston located in an oil basin, and a cylinder into and out of which the piston is adapted to pass as the pump is operated, so that at each reciprocation, a definite amount of oil is collected in the cylinder and forced from it through suitable distributing ducts to the parts to be lubricated.

The character' of the invention will be best understood from the following detailed description taken in connection with the accompanying drawings, and the various features and combinations which I regard as my invention will be particularly pointed out in the-appended claims.

In the drawings, Figure l is a view of a portion of an air-compressor, showing the compressing pistons in elevation and a ubricating device constructed in accordance with my invention attached thereto and Fig. 2 is an end view of such device and a portion of the compressing pistons.

In both of these views like characters refer to like parts.

The air-compressor illustrated is substantially the same as that disclosed in the application of Asa F. Batchelder, Serial No. 74,244, iled Sept. 3, 1901, but diliers therefrom in comprising certain improvements in piston construction which are herein shown but not claimed since the same are to be presented in a separate application. For the purposes of this case it is sufiicient to state that the'comressing pistons 10 and 11 are arranged in ine and as they reci rocate in their cylinders formed in the casing 12 draw in air u on one stroke and compress it on the ot er. Each of the pistons 10 11 is com osed of a single casting which includes suitable spring cases 13 and 14 in which are located springs 15 which are arranged to draw the istons toward each other. A driving cran -shaft 16 is located between the pistons 10 and 11. Motion is transmitted from the crank-shaft through pitmen 17 18 which bear at their opposite ends against the crank-pin 19 and suitable wrist-pins 20 and 21 carried by the pistons 10 and 11 respectively. Secured to the lower part of the casing 12 is an oil basin 22 which is provided with an open top 23.

The oil device comprises a casting 24 which is detachably secured by bolts 25 to the casting of the piston 10. The casting 24 is provided at its lower end with a horizontallydisposed cylinder 26 which extends into the oil in the basin 22. A iixed piston 28 located within the basin 22 is ada ted to pass into and out of the bore 27 of t e cylinder 26 as the pistons of the compressor reciprocate. A slight clearance is provided between the piston 28 and the interior of the cylinder 26, so that these parts never come into wearing engagement but are always separated by a ilm of oil. Consequently the parts of the pump are practically indestructible. The chamber 27 of the cylinder communicates with suitable ducts 29 which lead to the parts to be lubricated. These ducts are formed in part by holes drilled in the casting 24 and in part by tubes connecting said holes. As clearly illustrated, they lead to the delivery points 30, 31 and 32 at the upper side of the wrist-pins 20 and 21 and the crank-pin 19.

The amount of oil delivered to the bearin s depends u on the clearance between the cy inder 26 anc its piston 28 and the relative capacities of the chamber 27 and the ducts 29. The capacity of the chamber 27 should exceed that of the ducts by an amount suficient for the lubrication of the bearings. This amount may be varied by varying the longitudinal position of the piston 28 by screwing it in or out of the casing.

The Operation of the device is as follows: The cylinder 26 reciprocates with the comression pistons 10 and 11 and at each to and iro movement supplies a definite amount of oil to the bearings of the compressor. In its movement in one direction, the cylinder 26 asses beyond the piston 28 and oil from .the basin 22 flows into the chamber 27. Upon its return movement, the cylinder forces the collected oil from saidl chamber up through the distributing ducts 29 and by reason of the relative capacities of the chamber 27 and the ducts 29 a small amount of oil is supplied to the bearings. As the cylinder 26 is drawn from the piston 28 any oil that remains in theV ducts 29 is drawn back into the cylinder and mingles with the new supply of oil from the basin admitted when the cylinder passes clear of the piston. The oil that is supplied to the bearings may readily drain off into the chamber beneath the compressor pistons and thence into the oil basin to be used over again.

From the above it will be seen that I have devised a valveless oil pump which is simple and durable in construction and positive in its action. It will also be apparent to those skilled in the art that modifications and alter# ations may be made in the device which I have shown without departing from the spirit and scope of my invention. I therefore do not wish to be limited to the specific matter shown but aim to cover by the terms of the appended claims all such alterations and modifications.

l/Vhat I claim as new and desire to secure by Letters Patent of the United States, is:

l. An oil pump comprising an oil basin, a cylinder open at one end and having a duct leading from near the other end and arranged for reciprocation in said basin, a piston located in said basin and arranged to enter said cylinder as the latter is reciprocated, and means for adjusting the extent to which the piston enters the cylinder.

2. An oil pump comprising an oil basin, a cylinder open at one end having a duct leading from near the other end and arranged for reciprocation in said basin, a piston located in said basin and arranged to enter said cylinder as the latter reciprocates, and means folC adjusting the piston relatively to the cyl- 1n er.

AV3.- The combination of an oil basin, a reciprocating piston, an operating pitman therefor, a pump extending into said basin and operated by said piston, and distributing oil ducts leading from said pump to the bearing surfaces of said piston and pitman.

4. The combination of an oil basin, a piston iixed therein, a reciprocating member, and a cas ting detachably secured to said member and provided with oil distributing ducts Iand a cylindricalchamber communicating with said ducts into which the lixed piston is adapted to pass when said member reciprocates.

' 5. rlhe combination with an oil basin, of an oil pump comprising a piston iXed in said basin, and a reciprocating cylinder into which said piston is adapted to pass as the cylinder reciprocates, said cylinder having a movement beyond the end of the piston as it reciprocates.

6. The combination with an oil basin, of an oil pump comprising a piston iiXed in said basin, and a reciprocating cylinder' into which said piston is adapted to pass as the cylinder reciprocates, said cylinder having a movement beyond the end of the piston as it reciprocates and there being a clearance between it and the piston whereby part of the oil which flows into the cylinder at each stroke is allowed to escape back into the basin.

In witness whereotl I have hereunto set my hand this 6th day of April, 1904.

EINAR J. BRING.

lVitnesses:

BENJAMIN B. HULL, HELEN OREORD. 

